使用如下四段话就可以解决actionBar不现实Logo的问题。
android.support.v7.app.ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setLogo(R.mipmap.qiu_ic_launcher);
actionBar.setDisplayUseLogoEnabled(true);
使用如下四段话就可以解决actionBar不现实Logo的问题。
android.support.v7.app.ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayShowHomeEnabled(true); actionBar.setLogo(R.mipmap.qiu_ic_launcher); actionBar.setDisplayUseLogoEnabled(true);
For Android 2.1 and higher
When using the Support Library, your style XML file might look like this:
res/values/themes.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <!-- the theme applied to the application or activity --> <style name="CustomActionBarTheme" parent="@style/Theme.AppCompat"> <item name="android:actionBarTabStyle">@style/MyActionBarTabs</item> <!-- Support library compatibility --> <item name="actionBarTabStyle">@style/MyActionBarTabs</item> </style> <!-- ActionBar tabs styles --> <style name="MyActionBarTabs" parent="@style/Widget.AppCompat.ActionBar.TabView"> <!-- tab indicator --> <item name="android:background">@drawable/actionbar_tab_indicator</item> <!-- Support library compatibility --> <item name="background">@drawable/actionbar_tab_indicator</item> </style> </resources>
Then apply your theme to your entire app or individual activities:
<application android:theme="@style/CustomActionBarTheme" ... />
The ActionBar APIs were first added in Android 3.0 (API level 11) but they are also available in the Support Library for compatibility with Android 2.1 (API level 7) and above
Caution: Be certain you import the ActionBar class (and related APIs) from the appropriate package:
- If supporting API levels lower than 11:
import android.support.v7.app.ActionBar - If supporting only API level 11 and higher:
import android.app.ActionBar
ActionBarActivity
extends AppCompatActivity，继承自AppCompatActivity Caution: Be certain you import the ActionBar class (and related APIs) from the appropriate package:
- If supporting API levels lower than 11:
import android.support.v7.app.ActionBar - If supporting only API level 11 and higher:
import android.app.ActionBar
Adding the Action Bar
As mentioned above, this guide focuses on how to use the ActionBar APIs in the support library. So before you can add the action bar, you must set up your project with the appcompat v7 support library by following the instructions in the Support Library Setup.
Once your project is set up with the support library, here's how to add the action bar:
- Create your activity by extending
ActionBarActivity. - Use (or extend) one of the
Theme.AppCompatthemes for your activity. For example:<activity android:theme="@style/Theme.AppCompat.Light" ... >
Now your activity includes the action bar when running on Android 2.1 (API level 7) or higher.
On API level 11 or higher
The action bar is included in all activities that use the Theme.Holo theme (or one of its descendants), which is the default theme when either the targetSdkVersion or minSdkVersion attribute is set to "11" or higher. If you don't want the action bar for an activity, set the activity theme to Theme.Holo.NoActionBar.
Removing the action bar
You can hide the action bar at runtime by calling hide(). For example:
ActionBar actionBar = getSupportActionBar();
actionBar.hide();